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Finding the Fourth Proportional to 65,009.60, 89,712.12 and 36,329.72

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Solution

The fourth proportional to 65,009.60, 89,712.12 and 36,329.72 is: 50,134.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,009.60 : 89,712.12 = 36,329.72 : x
  2. Step 2: Convert to fraction form
    65,009.60/89,712.12 = 36,329.72/x
  3. Step 3: Cross multiply
    65,009.60x = 89,712.12 × 36,329.72
  4. Step 4: Simplify right side
    65,009.60x = 3,259,216,200.21
  5. Step 5: Solve for x
    x = 3,259,216,200.21/65,009.60
  6. Step 6: Final answer
    x = 50,134.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.